Water-box for pumps.



A. J. POCOCK.

WATER BOX FOR PUMPS.

APPLICATION FILED APR-14, 1916.

1 ,226,693. Patented. May 22, 1917.

2 SHEETS-*SHEET I.

TKRS co" wunm-u-ma. wnsumc mu. 0. c.

Patented May 22, 1917.

2 SHEETS-SHEET 2.

Wit/nebula Q? seat.

AUGUSTINE J. POCOCK, OF DAYTON, OHIO.

WATER-BOX FOR PUMPS.

Specification of Letters Patent.

Patented May 22, 1917.

Application filedApriI 14, 1916. 1 Serial No. 91,233.

To all whom it may concern Be it known. that I, AUGUSTINE J. P- COCK, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Qhio,have invented certain being had to the accompanying drawings,

and to the letters and figures of reference marked thereon, which form a partof this specification.

My invention relates to. newand useful improvements in the liquid endof pumps or more commonly speaking water boxes. The objects of the invention'are: to provide a pump which is especially serviceable for use in mines and having a capacity for a constant discharge and the operation of which is attended with a minimum of shock or vibration; to provide a pump ofcompara-' tively simple and inexpensive construction and the parts of which are easily accessible for repairs; to provide means in apump of the above type whereby the discharge valves are always immersed thereby preventing the pump drawing air if for any reason the discharge valve should leak; and to provide a valvestem which is common to both the suction and discharge valves and may be made of any acid-resisting material, which usually does not possess great tensile strength, but

is available in the pump of my construction and design owing to the manner ofmounting said valve stem. That is to say, it is easily removable owing to the avoidance of a screw-threaded connection with the valve practice, the said stem is slipped through and into the valve seats but is disconnected therefrom. This feature is particularly valuable where the pump is used for pump- Instead of being screwed into or united to the seat according to. the commonv is an irregular section on the lines 33 of Figs. 1 and 2; and Fig. 1 is a section on the lines l-4 of Figs. 1 and2.

In the specification and drawings, similar reference characters indicate corresponding parts.

Referring more particularly to the drawings, 5 representsa cylinder provided, in the present instance, with a liner 6 and heads 7 and 8. In furtherance of my plan of simplificationand efliciency, I provide means for holding the cylinder liner 6 in position consisting of a suitable number of bolts 46 constructed of any suitable acid-resisting material. Theinner ends of these pins engage the flange 6 of saidliner and hold it firmly against the adjacent part of the cylinder. The outer endsof saidpins are supported in apertured bosses 48 which lie both on the inside and outside of the cylinder head 8. Screws 47 penetrate said apertured bosses and engage the outer ends of said bolts and hold them firmly against the liner flange 6. Reciprocating in the liner 6 is the usual piston 9 attached to the end of the piston rod 10 which extends out of the cylinder through a packing gland 11 on the head 7. Attached to the side of the cylinder 5 is an oflset or housing 1 1 provided with a suction chamber 13 in the lower portion thereof. The suction chamber 18 is provided with a suction opening 17thediameter of which is shown in broken lines in Fig. 4. The said opening may be connected to a suction pipe (not shown) through the agency of a pad 18. The offset portion or housing 14 is provided with-a deck 15 for the suction valve seat and a deck 16 for the discharge valve seat. The decks 15 and 16 are connected by an intermediate wall 19 which divides the space between said decks into pulsation chambers 20 which are non-communicating but connect with the endsof the cylinder through ports 12. Mounted in the valve deck 15 are the suction valve seats 21 of acid-resisting material and upon which rest valve disks 22 which are under the influence of springs 23, and mounted in the valve deck 16 are the dis charge valve seats 24 of acid-resistingniaterial and upon which rest valve disks 25 under the influence of springs 26. The valve disks 22 and 25 are vertically movable on stems 27 which pass through the valve disks and seats. The lower ends of said stems 27 enter openin s in sockets 28 of the seats 21 and are hel in a central position thereby with no connection with either valve or seat. The said stems 27 are constructed of acidresisting material and provided with shoulders 29 which engage apertured bosses 30 of the seats 24 and thereby hold said seats in position in the deck. When the stems 27 are removed, which may be easily done in case of necessity, the valve 25 and the seat 24 may also be lifted out to permit access to the lower suction valves 22 and their seats. The upper ends of the stems 27 are engaged and held downwardly to maintain seats 24 in their proper position by screws 31 which penetrate removable yokes 32. The ends of said yokes are formed to engage the under side of the top 33' of the housing 14. The

said top 33 of the housing 14 is provided with openings 34 which-permit access to be had to the valves when necessity requires. The said openings 34 are closed by caps 35 held in position by a yoke 36 which is pressed downwardly by means of a nut 37 on a stud 38-. The stud 38 engages an apertured boss 39 in the top 33 of the housing. The said top 33 at the boss 39 is strengthened by a division wall 40-. a The caps 35 are semi: globular in shape and provide shock chambers which cushion the impact of the water passing through the discharge valves 25. As these shock chambers are located directly above the discharge valves, the cushion is very effective and serves to eliminate the effect ofwater-hammer when the pump is operated at high speed. The deck 16 and the top 33 form discharge chambers 41'which communicate with the interior of an air and the ports 43. The tops of the spillways- 45 are above the bottom .of the valves 25. The spillways 45 will, therefore, when the pump is not in operation, retain suflicient water in the discharge chambers 41 to immerse the valves 25'. The valves 25 will, therefore, be immersed at all times thus'pre venting the pump drawing air through the discharge valves should said discharge valves be leaky.

It will be seen from the foregoing description and the drawings that the device is compact and devoid of complication; that" the valves are easily accessible, and experience shows that the pump will operate at high speed. The durability of'the valve structure is increased owing to the acid-resisting character of the disks, their seats and the stem and if the displacement of any part'of the valve structure becomes necessary this may be done with facility.- 1 Having described my invention, I claim.

and discharge valves cooperating with seats in said valve decks, means for maintaining said valves in proper position including a stem constructed of acid-resisting material penetrating said valves and disconnected therefrom, and semi-globular caps mounted on said housing above said valves adapted to permit access to be had to said valves and forming shock chambers for the liquid passing through the valves.

2. In a pump of the type specified, a cylinder, a housing arranged along the side of said cylinder and having valve decks, division walls 'dividing the space therein into a suction chamber, pulsation chambers and discharge chambers, openings in the top of said housing, valve seats mounted in said valve decks, valves cooperating with said seats, stems constructed of acid-resisting material upon which said valves are slidable, yokes adapted to hold said valve stems in position, and semi-globular caps mounted above the openings in the top of the housing andforming shock chambers for the water passing through the valves.

3. In a pump of the type specified, a cylinder, a housing mounted along one side o-f'said cylinder having valve decks, division walls: dividingthe space within said housing into a suction chamber, pulsation chambers and discharge chambers, openings in the top of said housing, suction and discharge valve seats mounted in said valve decks, suction and discharge valves mounted on said seats, stems upon which said valves are freely movable, said stems being constructed of acid-resisting material, yokes within the openings in the top of the housing, said yokes having their ends formed to engage the edges surrounding the said openings, screws mounted insaid yokes to hold said stems in position, and caps above said openings and forming shock chambers for. the water passing through said valves.

4. In a pump of the type specified, a cylinder having" its ends increased in diameter to form chambers thereat, one of said increased diameters forming an annular flange seat, a housing arranged at the side of said cylinder having a vertical division Wall dividing the space therein into suction, pulsation and discharge chambers, the pulsation chamber being in communication with the cylinder chambers, a lining for said cylinder having one endflan-ged to fit the flange seat at one end of said cylinder, bolts engaging said flanges with their outer. ends restingin apertured bosses in. meet the cylinder heads, binding screws in said aperturedbosses-engaging said bolts, suction and discharge valves Within said pulsation and discharge chambers, seats for said valves having axial apertured bosses, one of Which has an annular shoulder at the entrance to the opening therein, a stem common to both valves and upon which said valves are sliclably mounted, said stem extending through said bosses and having a shoulder which engages the annular shoulder in one of said bosses, a yoke spanning the upper portion of the discharge chamber and having its ends formed to engage the upper end of the housing, said yoke having a centrally disposed threaded opening, and a screw penetrating said opening and engaging the upper end of said stem to rigidly maintain the stem in position, substantially as described.

In testimony whereof I afiiX my signature, in presence of two Witnesses.

AUGUSTINE J. POCOCK. Witnesses:

R. J. McGARTY, MELLIE GALLoWAY.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, D. G. 

